Buggy code:
public class Task implements BigDataScriptSerialize { public static final int EXITCODE_OK = 0 ; public static final int EXITCODE_ERROR = 1 ; public static final int EXITCODE_TIMEOUT = 2 ; public static final int EXITCODE_KILLED = 3 ; public static final int MAX_HINT_LEN = 150 ; public static final String DEFAULT_TASK_SHELL = "//bin//sh<seq2seq4repair_space>-e" ; protected boolean verbose ; protected boolean debug ; protected boolean allowEmpty ; protected boolean canFail ; protected boolean dependency ; protected int bdsLineNum ; protected int exitValue ; protected int failCount ; protected int maxFailCount ; protected String id ; protected String bdsFileName ; protected String currentDir ; protected String pid ; protected String programFileDir ; protected String programFileName ; protected String programTxt ; protected String node ; protected String queue ; protected String stdoutFile ; protected String stderrFile ; protected String exitCodeFile ; protected String errorMsg ; protected String postMortemInfo ; protected String taskName = "" ; protected Date runningStartTime ; protected Date runningEndTime ; protected TaskState taskState ; protected HostResources resources ; TaskDependency taskDependency ; public Task ( ) { } public Task ( String id ) { } public Task ( String id , Expression expr , String programFileName , String programTxt ) { } public Task ( String id , String programFileName , String programTxt , String bdsFileName , int bdsLineNum ) { } public void addDependency ( Task taskDep ) { } public boolean canChangeState ( TaskState newState ) { } public boolean canRetry ( ) { } public boolean canRun ( ) { } public String checkOutputFiles ( ) { } public void createProgramFile ( ) { } public void deleteOnExit ( ) { } public void deleteOutputFilesOnExit ( ) { } public DependencyState dependencyState ( ) { } protected synchronized DependencyState dependencyState ( Set < Task > tasksVisited ) { } public int elapsedSecs ( ) { } public String getBdsFileName ( ) { } public int getBdsLineNum ( ) { } public String getCurrentDir ( ) { } public List < Task > getDependencies ( ) { } public String getErrorMsg ( ) { } public String getExitCodeFile ( ) { } public synchronized int getExitValue ( ) { } public int getFailCount ( ) { } public String getId ( ) { } public List < String > getInputFiles ( ) { } public int getMaxFailCount ( ) { } public String getName ( ) { } public String getNode ( ) { } @ Override public String getNodeId ( ) { } public List < String > getOutputFiles ( ) { } public synchronized String getPid ( ) { } public String getPostMortemInfo ( ) { } public String getProgramFileName ( ) { } public String getProgramHint ( ) { if ( ( programTxt ) == null ) return "" ; int maxHintLen = Config . get ( ) . getTaskMaxHintLen ( ) ; ArrayList < String > filterOutTaskHint = Config . get ( ) . getFilterOutTaskHint ( ) ; StringBuilder hint = new StringBuilder ( ) ; for ( String line : programTxt . split ( "\n" ) ) if ( ! ( line . startsWith ( "#" ) ) ) { <START_BUG> line = line . replace ( '\'' , '<seq2seq4repair_space>' ) . replace ( '\t' , '<seq2seq4repair_space>' ) . replace ( '\n' , '<seq2seq4repair_space>' ) . trim ( ) ; <END_BUG> boolean showLine = ! ( line . isEmpty ( ) ) ; if ( showLine ) { for ( String fo : filterOutTaskHint ) showLine &= ! ( line . contains ( fo ) ) ; } if ( showLine ) { if ( ( hint . length ( ) ) > 0 ) hint . append ( ";<seq2seq4repair_space>" ) ; hint . append ( line ) ; } } if ( ( hint . length ( ) ) < maxHintLen ) return hint . toString ( ) ; return hint . toString ( ) . substring ( 0 , maxHintLen ) ; } public String getProgramTxt ( ) { } public String getQueue ( ) { } public HostResources getResources ( ) { } public Date getRunningEndTime ( ) { } public Date getRunningStartTime ( ) { } public String getStderrFile ( ) { } public String getStdoutFile ( ) { } public String getTaskName ( ) { } public TaskState getTaskState ( ) { } public boolean isAllowEmpty ( ) { } public boolean isCanFail ( ) { } public boolean isDependency ( ) { } public synchronized boolean isDone ( ) { } public synchronized boolean isDoneOk ( ) { } public synchronized boolean isFailed ( ) { } public boolean isScheduled ( ) { } public boolean isStarted ( ) { } public boolean isStateError ( ) { } public boolean isStateFinished ( ) { } public boolean isStateRunning ( ) { } public synchronized boolean isStateStarted ( ) { } public boolean isTimedOut ( ) { } public void reset ( ) { } @ SuppressWarnings ( "unchecked" ) @ Override public void serializeParse ( BigDataScriptSerializer serializer ) { } @ Override public String serializeSave ( BigDataScriptSerializer serializer ) { } public void setAllowEmpty ( boolean allowEmpty ) { } public void setCanFail ( boolean canFail ) { } public void setCurrentDir ( String currentDir ) { } public void setDebug ( boolean debug ) { } public void setDependency ( boolean dependency ) { } public void setErrorMsg ( String errorMsg ) { } public synchronized void setExitValue ( int exitValue ) { } public void setMaxFailCount ( int maxFailCount ) { } public void setNode ( String node ) { } public void setPid ( String pid ) { } public void setPostMortemInfo ( String postMortemInfo ) { } public void setQueue ( String queue ) { } private void setState ( TaskState taskState ) { } public void setTaskDependency ( TaskDependency taskDependency ) { } public void setTaskName ( String taskName ) { } public void setVerbose ( boolean verbose ) { }

Fix:
line = line . replace ( '\'' , '<seq2seq4repair_space>' ) . replace ( '\t' , '<seq2seq4repair_space>' ) . replace ( '\n' , '<seq2seq4repair_space>' ) . replace ( '\\' , '<seq2seq4repair_space>' ) . trim ( ) ;